tests: lib: cmsis_dsp: Disable testing on mps3_an547

This commit disables running the CMSIS-DSP tests on the mps3_an547
board because the QEMU, which is default emulation platform for it,
does not currently support the emulation of the MVE instructions.

Refer to the issue #37694 for more details.

Revert this commit once QEMU 6.2 is released and integrated into the
Zephyr SDK.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>